#! /bin/sh
# PCP QA Test No. 657
# checks pmdadm functionality
# Requires dmsetup utility to be installed, else the test will
# not run (PMDA will fail to install).
#
# Copyright (c) 2015 Red Hat, Inc. All Rights Reserved.
#
seq=`basename $0`

# get standard environment, filters and checks
. ./common.product
. ./common.filter
. ./common.check

echo "QA output created by $seq"

[ $PCP_PLATFORM = linux ] || _notrun "Device Mapper is Linux-specific (dm)"
[ -d $PCP_PMDAS_DIR/dm ] || _notrun "dm PMDA directory is not installed"
[ -x $PCP_PMDAS_DIR/dm/pmdadm ] || _notrun "pcp-pmda-dm package not installed"
grep -qs "without support for dmstats" $PCP_PMDAS_DIR/dm/pmdadm && _notrun "PMDA not built with dmstats support"
which dmsetup >/dev/null 2>&1 || _notrun "dmsetup from device-mapper package is not installed"

root=$tmp.root
export DM_SETUP_CACHE="cat $root/dmcache-caches"
export DM_SETUP_THINPOOL="cat $root/dmthin-pool"
export DM_SETUP_THIN="cat $root/dmthin-thin"

# don't want Install to possibly restart pmcd via systemctl, as this
# will clobber the environment, ...
#
_service pcp stop | _filter_pcp_stop
if [ "$PCPQA_SYSTEMD" = x -o "${PCPQA_SYSTEMD-x}" != x ]
then
    # $PCPQA_SYSTEMD is already set ...
    save_pcpqa_systemd="$PCPQA_SYSTEMD"
    restore_pcpqa_systemd=true
else
    restore_pcpqa_systemd=false
fi
export PCPQA_SYSTEMD=no

# helper functions

_install_pmda()
{
    # install the PMDA
    # Note: warnings from dmstats install are optional, so filter 'em out
    # Note: VDO stats are exercised via separate tests, so filter 'em out
    #
    cd $PCP_PMDAS_DIR/dm
    $sudo ./Remove < /dev/null >/dev/null 2>&1
    $sudo ./Install < /dev/null >$tmp.out 2>&1
    cat $tmp.out \
    | _filter_pmda_install \
    | sed \
	-e '/.*pmcd.*/d' \
	-e '/.*pmlogger.*/d' \
	-e '/^NOTE:.*/d' \
	-e '/Latest.*/d' \
	-e '/Duplicate.*/d' \
	-e '/^See also.*/d' \
	-e '/^Check vdo metrics.*/d' \
	-e '/^To use the dmstats metrics.*/d' \
	-e '/^Check dmstats metrics/s/[0-9][0-9]* warnings, //' \
	-e 's/[0-9]* values/X values/' \
    | tr -s '\n'
}

_remove_pmda()
{
    cd $PCP_PMDAS_DIR/dm
    $sudo ./Remove < /dev/null > /dev/null 2>&1
}

_cleanup()
{
    if $restore_pcpqa_systemd
    then
	export PCPQA_SYSTEMD="$save_pcpqa_systemd"
    else
	unset PCPQA_SYSTEMD
    fi
    _restore_pmda_install dm
    _service pcp restart 2>&1 | _filter_pcp_start
    _restore_auto_restart pmcd
    _wait_for_pmcd
    _wait_for_pmlogger
    $sudo rm -fr $root
    $sudo rm -fr $tmp.*.dir
    $sudo rm -f $tmp.*
    exit $status
}

status=1 # failure is the default!
trap "_cleanup" 0 1 2 3 15
_stop_auto_restart pmcd

$sudo rm -fr $root
$sudo rm -fr $tmp.*.dir
$sudo rm -f $tmp.* $seq.full
touch $here/$seq.full

# real QA test starts here
cd $here

echo
echo "=== Setting up QA fakeroot testing data ==="
$sudo rm -fr $root
mkdir $root || _fail "root in use when processing fakeroot"
cd $root
echo 'zz_cache: 0 1677721600 cache 8 10162/262144 128 39839/3276800 1087840 821795 116320 2057235 0 39835 0 1 writeback 2 migration_threshold 2048 mq 10 random_threshold 4 sequential_threshold 0 discard_promote_adjustment 1 read_promote_adjustment 0 write_promote_adjustment 0' > $root/dmcache-caches
echo 'yy_pool: 0 409600 thin-pool 0 13/65536 0/3200 - rw no_discard_passdown queue_if_no_space' > $root/dmthin-pool
echo 'vg_1-lv3: 0 8388608 thin 7000704 8388607
vg_1-lv2: 0 8388608 thin 6832768 8388607' > $root/dmthin-thin
cd $here

echo
echo "=== Installing Device Mapper PMDA ==="
_prepare_pmda_install dm
_install_pmda

echo
echo "=== Check dm-cache metrics ==="
pminfo -dfmtT dmcache

echo
echo "=== Check dm-thin metrics for thin pool metrics ==="
pminfo -dfmtT dmthin.pool

echo
echo "=== Check dm-thin metrics for thin vol metrics ==="
pminfo -dfmtT dmthin.vol

# cleanup
_remove_pmda

status=0
exit
